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Title: Complex superconductivity in the noncentrosymmetric compound Re 6Zr

Abstract

Here, we report the electronic structure, synthesis, and measurements of the magnetic, transport, and thermal properties of the polycrystalline noncentrosymmetric compound Re 6Zr . We observed a bulk superconducting transition at temperature T c ~ 6.7 K, and measured the resistivity, heat capacity, thermal conductivity, and the London penetration depth below the transition, as well as performed doping and pressure studies. From these measurements we extracted the critical field and the superconducting parameters of Re 6Zr. Lastly, our measurements indicate a relatively weak to moderate contribution from a triplet component to the order parameter, and favor a full superconducting gap, although we cannot exclude the existence of point nodes based on our data.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [3]
  1. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  3. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1347895
Alternate Identifier(s):
OSTI ID: 1329946
Report Number(s):
IS-J-9194
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1701337
Grant/Contract Number:  
DMR-1306392; DMR-1410741; DMR-1157490; FG02-07ER46420; FG02-13ER46946; AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 14; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Khan, Mojammel A., Karki, A. B., Samanta, T., Browne, D., Stadler, S., Vekhter, I., Pandey, Abhishek, Adams, P. W., Young, D. P., Teknowijoyo, S., Cho, K., Prozorov, R., and Graf, D. E. Complex superconductivity in the noncentrosymmetric compound Re6Zr. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.144515.
Khan, Mojammel A., Karki, A. B., Samanta, T., Browne, D., Stadler, S., Vekhter, I., Pandey, Abhishek, Adams, P. W., Young, D. P., Teknowijoyo, S., Cho, K., Prozorov, R., & Graf, D. E. Complex superconductivity in the noncentrosymmetric compound Re6Zr. United States. doi:10.1103/PhysRevB.94.144515.
Khan, Mojammel A., Karki, A. B., Samanta, T., Browne, D., Stadler, S., Vekhter, I., Pandey, Abhishek, Adams, P. W., Young, D. P., Teknowijoyo, S., Cho, K., Prozorov, R., and Graf, D. E. Mon . "Complex superconductivity in the noncentrosymmetric compound Re6Zr". United States. doi:10.1103/PhysRevB.94.144515. https://www.osti.gov/servlets/purl/1347895.
@article{osti_1347895,
title = {Complex superconductivity in the noncentrosymmetric compound Re6Zr},
author = {Khan, Mojammel A. and Karki, A. B. and Samanta, T. and Browne, D. and Stadler, S. and Vekhter, I. and Pandey, Abhishek and Adams, P. W. and Young, D. P. and Teknowijoyo, S. and Cho, K. and Prozorov, R. and Graf, D. E.},
abstractNote = {Here, we report the electronic structure, synthesis, and measurements of the magnetic, transport, and thermal properties of the polycrystalline noncentrosymmetric compound Re6Zr . We observed a bulk superconducting transition at temperature Tc ~ 6.7 K, and measured the resistivity, heat capacity, thermal conductivity, and the London penetration depth below the transition, as well as performed doping and pressure studies. From these measurements we extracted the critical field and the superconducting parameters of Re6Zr. Lastly, our measurements indicate a relatively weak to moderate contribution from a triplet component to the order parameter, and favor a full superconducting gap, although we cannot exclude the existence of point nodes based on our data.},
doi = {10.1103/PhysRevB.94.144515},
journal = {Physical Review B},
number = 14,
volume = 94,
place = {United States},
year = {Mon Oct 24 00:00:00 EDT 2016},
month = {Mon Oct 24 00:00:00 EDT 2016}
}

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Works referenced in this record:

Generalized Gradient Approximation Made Simple
journal, October 1996

  • Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias
  • Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868
  • DOI: 10.1103/PhysRevLett.77.3865